HELP PLEASE ASAP!

1. Which of the following best describes how humans depend on grassland ecosystems to meet our needs?

We depend on grasslands for their supply of minerals and ores that we use in trade.
We depend on grasslands for farming and agriculture, which provides us with food.
We depend on grasslands to serve as a location for the development of wind energy.
We depend on grasslands to provide lumber, which we use to build houses for shelter.

2. Which of the following is the best explanation of why cotton was grown in the Southern colonies?

The Southern colonies had nutrient-rich dense soil and mild weather.
The New England colonies did not have enough land to grow cotton.
The Southern colonists enjoyed farming cotton more than other crops.
The New England colonists were more highly educated than the South.

3. Which source would give the most accurate number of slaves in the colonies?

Government records of the sale of slaves
Paintings and images of slaves on plantations
Writings about slave life from eyewitnesses
Stories passed down from generations of slaves